var circleObj = {
    "circumference": function circumference(r){
        this.r = r;
        var circumference1 = Math.PI * r * 2;
        return circumference1;
    },
    "area": function area(r){
        this.r = r;
        var area1 = Math.PI * r * r;
        return area1;
    }
}

var r;

module.exports = circleObj;